Internal Reliabilities of the Scales from the Inpatient Multidimensional Psychiatric Scale

Abstract

Three different measures of internal reliability were calculated for each of the 12 scales from the Inpatient Multidimensional Psychiatric Scale with data from a sample of 1654 inpatients. The homogeneity of the items forming the different scales could be assessed and the least homogeneous scales examined in more detail. The minimum number of items necessary to bring Cronbach's alpha to over .90 was also calculated for each scale and satisfactory figures were obtained.